FOLD, OVERTURNED

A fold in which both the limbs dip in the same direction is called an overfold or overturned fold. The folds of this kind are generally produced either by gravity gliding or in a layer on minor scale that is appreciably inclined (but less than 45 degrees) to the principal shortening direction. . A fold whose axial plane is horizontal is called a recumbent fold. Such folds on major scale are common in orogenic belts.